openRECEIVER Blog

Downstream space, explained by engineers

Expert guides on GNSS, RTK, PNT, Earth observation and the protocols that move space data to the ground.

The Standard in the Sky: 3GPP NTN

3GPP NTN release by release, read as a product planning horizon: what ships today, what Rel-19 added, and which deltas are firmware versus a silicon respin.

18 Aug 2026

Agriculture

Wildfire Risk: Forest Fuel Monitor with Sentinel-1 and Sentinel-2

Which Sentinel-1 and Sentinel-2 bands track forest fuel dryness, how to build the anomaly baseline, and the alert rules behind a working wildfire monitor.

8 Aug 2026

Space Missions

LEO-PNT Signals Aren't Just Closer GNSS: Inside CELESTE's Four-Band Plan

A signal-level look at LEO-PNT signals: CELESTE broadcasts across L, S, UHF and C band with pilot, data and acquisition components, and mixes FDMA with CDMA.

1 Aug 2026

Space Missions

The Future of Satellite Navigation Is Layered, Not Just Better GPS

The future of satellite navigation is a layered, resilient PNT stack: modernized GPS and Galileo, commercial LEO-PNT, and signals of opportunity. Here is what changes.

13 Jul 2026

Agriculture

GIS and Remote Sensing in Agriculture: Making Satellite, Drone and Ground Data Agree

How to fuse satellite, drone and ground data for in-season agronomic decisions: the resolution and revisit trade-offs, and pixel vs feature vs decision fusion.

3 Jul 2026

Consumer & Developer

Android Raw GNSS Measurements: From the API to On-Device RTK

Use the Android raw GNSS measurements API: reconstruct pseudoranges, read carrier phase and cycle-slip flags, and feed an on-device RTK or PPP engine.

29 Jun 2026

Automotive & Mobility

Functional Safety for Automotive GNSS: Why Accuracy Is Not Enough

Standard GNSS accuracy is not safety. How protection levels, alert limits and ISO 26262 vs ISO 21448 (SOTIF) make automotive GNSS trustworthy for ADAS.

29 Jun 2026

Agriculture

Satellite Crop Monitoring That Survives Clouds: Beating Revisit Gaps with Harmonization and SAR

A 5-day revisit is not what you get under cloud. Build satellite crop monitoring that survives gaps with HLS harmonization, Sentinel-2, Planet and SAR.

27 Jun 2026

RTK & High-Precision

RTK Baseline, Latency and Atmosphere: Limits for the RTK Service

How far can single-base RTK reach? The 10 to 20 km baseline limit, the 1 ppm rule, correction latency, and the ionosphere, with the numbers and the fixes.

22 Jun 2026

Automotive & Mobility

Satellite-assisted Lane-Level Navigation: The Sensor Fusion That Knows Which Lane You're In

How lane-level navigation really works: fusing PPP-RTK GNSS, IMU, wheel odometry and HD maps, loose vs tight coupling, and dead reckoning through tunnels.

19 Jun 2026